You've got it backwards. Knowing what his child support requirements are, he has purposely reduced the number of hours he works, not to better care for the girl, but to devote more time to those atheistic causes that are so important to him.
By all appearances, the causes are more important to him than the little girl. Particularly considering that he was willing to lie to the court, and to the American people. (I heard the representations this glory hound has made in many of his media appearances. He has lied.)